1. Virtual Richard M. Stallman (vrms)- The vrms program will analyze the set of currently-installed packages on a Debian system, and report all of the packages from the non-free tree (and, optionally, from contrib) which are currently installed.

2. Apt-Cacher NG- Apt-Cacher NG is a caching HTTP proxy intended for use with download clients of system distribution's package managers. Supports Debian/Ubuntu (good), ArchLinux/OpenSUSE/Cygwin (basic). Target use case: alternative to local distro mirror in small LANs.

4. Debian Package Popularity Contest- The popularity-contest package sets up a cron job that will
periodically anonymously submit to the Debian developers
statistics about the most used Debian packages on this system.

5. Torrus packaging project- This is the Debian packaging project for Torrus, flexible and scalable frontend for Round Robin Database (RRDtool), implemented in Perl. More information is available at http://rrfw.sourceforge.net.

6. KernelLabo- KernelLabo is an environment for preparing and building kernel packages. It handles different configurations and different versions of kernel and supports 3rd-party patches. It uses flavours - different versions of the same configuration.